Global Patent Index - EP 0913424 A3

EP 0913424 A3 2000-02-23 - Coated expansible styrene particles

Title (en)

Coated expansible styrene particles

Title (de)

Beschichtete expandierbare Polystyrolpartikel

Title (fr)

Perles styréniques expansibles recouvertes

Publication

EP 0913424 A3 (DE)

Application

EP 98118982 A

Priority

DE 19747539 A

Abstract (en)

[origin: EP0913424A2] Expandable polystyrene particles (I) containing a blowing agent have a diameter of 0.35-3 mm and are coated with 0.005 to less than 0.5 wt.% of a hydrophobic agent (II) that melts above 10 degrees C. (II) is a carboxylate of aluminum, zirconium or hafnium. Independent claims are included for (i) the production of (I) by treatment of expandable polystyrene particles with an aqueous solution containing 5-50 wt.% (II) or by coating the expandable polystyrene particles with solid (II) that has been adsorbed onto fine particulate silicic acid; (ii) the production of expanded polystyrene particles by foaming (I) or by coating expanded polystyrene particles with 0.005 to less than 5 wt.% (II); and (iii) expanded polystyrene particles prepared from (I).

IPC 1-7

C08J 9/224; C08J 9/228

IPC 8 full level

C08J 9/224 (2006.01); C08K 5/098 (2006.01)

CPC

C08J 9/224 (2013.01); C08K 5/098 (2013.01); C08J 2325/06 (2013.01)

C-Set

C08K 5/098 + C08L 25/06

Citation (search report)

  • [AD] EP 0449065 A2 19911002 - BASF AG [DE]
  • [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 166 (P - 1713) 18 March 1994 (1994-03-18)

DCS

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

DE 19747539 A1 19990429; EP 0913424 A2 19990506; EP 0913424 A3 20000223; EP 0913424 B1 20041201; ES 2231935 T3 20050516